Thermostat



(No Model.)

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6 7 b 5, m w N A; ATTORNEYS.

UNrTeo STATES PATENT OFFICE.

GEORGE HILL, OF NEW BRUNSWICK, NEW JERSEY.

TH ERMOSTAT.

SPECIFICATION forming part of Letters Patent No. 545,076, dated August 27, 1895.

Application filed January 3, 1895- Serial No. 533,696- (No model.)

To all whom, it may concern:

Be it known that I, GEORGE HILL, a resident of New Brunswick, Middlesex county, State of New Jersey, have invented certain new and useful Improvements in Thermostats, of which the following is aspecification.

My invention relates to thermostats, and has for its object to produce a simple and reliable thermostat which may be set for any desired temperature within certain limits.

To this end my invention consists in the construction hereinafter set forth and claimed.

My invention will be understood by reference -to the accompanying drawings, in which- Figure 1 is a face view of a thermostat embodying my invention. Fig. 2 is a rear view of the same, and Fig. 3 is a section on line 3 3 of Fig. 2.

In the drawings, A is a thermostat-plate which forms a support for the various operating parts. B is a post thereon, upon which is directly mounted a spiral thermostatic strip, which may be of any desired construction, and to which is secured a contact strip or bar D, which terminates in the usual coritact-piece E. This contact-strip D is housed in a perforation F of the thermostat-plate.

G G are adjustable contacts, which are mounted in the walls of a containing-box H and insulated therefrom.

J J are resilient conductor-strips, which are in electrical connection with the contactpoiuts G G, respectively, and are connected to the binding-posts K K, which are mounted on the thermostat-plate A, but insulated therefrom.

L is a plate pivoted to the rear face of the thermostat-plate A by a pivot a. Secured to this plate is a lug 1), through which pass screws 0 c, which enter the wall of the box H, by which means the box H, carrying the contacts G G, is securely fastened to the pivoted plate L and moves therewith. The lower edge of the plate L is toothed, as at d, and meshes with a pinion 8, carried by a headed post g, which extends through the thermostat-plate and is supported thereby.

M is a bind-post which is in electrical connection with the thermostat-plate A, with which plate the thermostatic strip 0 is also in electrical connection.

The thermostat may be connected'in cir- -cuit in any suitable manner, such, for instance, as by connecting a positive terminal to the post K and a negative terminal to the post K, the third wire being connected to the post M to form a common return for the other two wires. It will be observed that the box H serves to protect the thermostat terminals from dust and oxidation. Itwill also be noticed that by turning the post g the plate L may be swung on its pivot to adjust the box H and its contact-points in one direction or the other, and since the contact-points themselves are individually and independently adjustable a great range of adjustment is possible.

' Having thus specifically described one form of my invention, I would have it understood that I do not mean to thereby limit myself to the exact construction shown and described, as the device may be modified in various particulars without departing from the spirit of my invention; but

What I claim, and desire to secure by Letters Patent, is-

1. The combination of a thermostatic strip, a covering box, independently adjustable contacts carried thereby and means for adjusting the box together with circuit connections, substantially as described.

2. The combination of a thermostatic strip, a covering box, independently adj ustable contacts carried by the box and extending into the same, a pivoted plate upon which the box is carried, and means for swinging the pivoted plate to adjust the position of the box, substantially as described.

3. In a thermostat, the combination of a box carrying independently adjustable contacts which extend into the same, a thermo- A, a. thermostatic strip C having a contact strip D, a box H into which the contact strip D extends, inde endentl adjustable ooni 1 tacts carried by 516 box a hd extending into GEORGE HILL 5 the same, a pivoted plate L upon which the WVitnesses:

box is carried having a toothed portion d and a post 9 carrying a pinion meshing with the toothed portion (7, substantially as described.

HARRY M. TURK,

.4130. E. MORSE. 

